"The five sorcerers"_PTR

While i was checking new things in PTR i stumbled upon this guy: "Master Nguyen", he is titled as one of the "five sorcerers", i found him in the house at the top of the rock spire that is linked to the temple of the jade serpent, he had this buff: The Power of the Storm.
the weird thing is that when i went back again to check him "just after 20 mins or so"....... *boof* he disappeared!!!! so what you guys think of the role that these 5 sorcerers will play in this patch, and what is their link to lei-shen the "Thunder King".

"So, I have this idea for a great movie. It's about two gnomes who find a bracelet of power, and they have to take it to the Burning Steppes and cast it into the Cauldron. They form the Brotherhood of the Bracelet. Along the way they're trailed by a murloc named Gottom, who's obsessed with the bracelet, and nine bracelet bogeymen. It could be a three-parter, called 'Ruler of the Bracelet'. The first part would be called 'The Brotherhood of the Bracelet', followed by 'A Couple of Towers', with the climactic ending called 'Hey, the King's Back!'"

In Eastern mythology there are 4 divine guardians protecting the lands which symbolize the 4 directions. There is a 5th guardian that represents the world as a whole.
They are:
Azure Dragon
Vermillion Bird
White Tiger
Black Tortoise
and the fifth is: Yellow Dragon

Obviously, Blizz changed it up a bit, but the basic idea is still there. If one of these sages was found at the Jade Serpent's temple, well...